Adjustable arm for multiple-spindle drills.



E. W. CLEVELAND.

ADJUSTABLE ARM FOR MULTIPLE SPINDLE DRILLS. APPLICATION FILED Am. 29, 1913.

1,082,009, Patented Dec. 23, 1913.

EDGAR CLEVELAND, .OF GRAND nArxns, MICHIGAN.

ADJUSTABLE any: FOR MULrrrLE-sPLuDLE mums.

,Specificatiou of Iietters Patent.

Patented Dec. 23, 1913.

Application filed August 29, 1913. Serial N0.-787 .287.

{1'0 all whom it may concern Be it known that. I, Enoan \V. Cnuvn- LAND, a citizen bf the United States of America, residingat Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Im rovements in Adjustable Arms for Mutiplc- Spindle Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will nable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in adjustable arms for multiple spindle drills, and its object is to provide an arm which is simple in construction, effective in operation, and on which the spindle bearing may be quickly and easily adjusted, and to provide the device with various new and useful features hereinafter more fully described and particularly pointed out in the claims.

In multiple spindle drills, a plurality of drill supporting arms are clamped to a common head and each arm carries at one end a vertically adjustable journal boxin whichis journaled a drill'spindle, these spindles all beingconnectedby a suitable means to a common prime mover by which they are rotated. The drills mounted in the spindles are not always the same length, and furthermore it is often desirable to drill holes different depths and for this urpose the journal boxes .carryingthe sp ndles are vertically adjustable on the arms. It is also desirable toprovide means b which these journal boxes may be quickl and easily adjusted andasthe drill spin les are often adjusted very close together it ,is necessary to have the journal box adjusting means accessible when so adjusted.

Ihave in this invention attained thea forementioned desirable features by constructinga drill supporting arm with a vertically ad usted journal box thereon and simple accessible means for quickly adjusting the same substantially "as shown in the accompanying drawings illustrating an embodiment of In invention, in which g Figure is an elevation of the upper portion of a multiplespindle drill showin' a plurality of drill supporting arms emboc ying my invention, in operative position thereon; Fig. 2 is an inverted plan view of a portion of the same; Fig. 3 is an enlarged sectional elevation of the preferred form of a drill supporting arm embodying my invention, removed from the machine; Fig. 4

is an inverted transverse section of the same on the line 4- to't' Fig. 3; Fig. 5 is a sec tional elevation of a portion of a modified form of my device; Fig. (i is a transverse section on the line 6-6 of Fig. 5; Fig. 7 is a sectional elevation of another modification of the same; and Fig. 8 is a transverse section on'the line 8 8 of Fig. 7.

Like numbers refer to like parts in all of the figures.

1 represents the frame of an ordinary multiple spindle drilling machine, on which is mounted ahead 2 having T'slots 3 in its under side. i

l is an adjustable arm provided with a longitudinal slot 5 through which a bolt (3 passes, said bolt having a T head within the tey slot 3. 'By means of this bolt 6 the arm 1 may be clamped in any desired po sition against the under side of the head 2.

In the preferred form of my invention illustrated in Figs 3 and 4, a journal box 7 having the drill spindle therein is Vertically slidable on a tongue and groove way pro- I vided at one end of the arm 4 the arm which carries the journal box is provided with two vertically extending slots 8, and two studs or bolts S) and 10 projecting from the journal box extend through the said slotsS, one stud being in each slot. Engaging the inside surface of the end of the arm 4 is located a lever 11 having a fulcrum point near its middle and between the slots 8. This lever preferably has slotted or bifurcated ends which embrace the respective studs9 and 10. The ends ofthe said studs are threaded and provided with nuts 9 and 10 adapted to engage the respective ends of the lever 11, and when tightened .the journal box 7 is firmly clamped against ,the end of the arm 4. The depth of the arm fl, to .obtain the necessary strength and r gidity, must be so great that the upper stud 9 and. the "nut 9 must be located well ,within the central opening through said arm, thus making them inaccessible for ordinaryadjustment, but the lower stud 10' and its adjusting nut 10 project through the lower portion of the end which is extended below the body of the arm and in this position the said nut may be readily engaged by a Wrench or like tool. It will be obvious that the operation of this one nut is all that. is necessary to tighten or loosen the strain on both studs, as any pres- The end of sure brought to bear upon the lower end Figs. and 6'*difi'ers fromthe onedescribed only in the location of the fulcrum of the lever 11; In this construction the fulcrum consists of a pin 12 which extends through the central part of the lever and projects oppositely beyond the said lever to engage vertically extending shoulders 13 on the interior of the arm 4: and are adjustable on the same.

Figs. 7 and 8 illustrate another modified form of clamping means in whichthe lever 11 is pivotally connected-by the bolt 14: to

the arm 4 and has no vertical movement. In

this construction T bolts 15 take the place of the studs 9 and 10 and extend through the end of the arm 4, their heads beinglocated in a Ve'rtieal T slot in the journal box .7 These bolts as in the other forms are respectively extended through-opposite ends of the leverll and are provided with nuts to engage said lever and clamp the journal box in lace.

It will be obvious that in any one of the above described formsof my invention it is only necessary to operate the lower nut 10 to either clamp or release the journal box 7 so that it may be'vertically adjusted to the desired position, and as this lower nut 10 rojects below the body of the arm 4 in each man it is always accessible and may be readily and quickly adjusted.

What ll claim is 1. An adjustablearm for multiple spindle drills, comprising an arm, a journal box vertically adjustableon the end of the arm,

a lever opposite to the box and fulcrumed intermediate its ends, and studs or bolts connecting the ends of the lever and the box to secure the'box in place or release the same for adjustment by operating one only of said studs or bolts.

2. An adjustable drill supporting arm,

- comprising an arm having a vertical opening therethrough, a vertical way on one end i of the arm, a journal box carrying a drill spindle vertically adjustable on said way, studs projecting from said journal box through the end of said arm, a centrally fulcrurned lever within the opening in said noaaooe the way, a vertically adjustable lever within the said opening and having a central fulcrum and also having bifurcated ends'respectively embracing said studs, and nuts on the studs to engage the ends of the lever.

4. An adjustable drill supporting arm, comprising an armhaving a vertical'opening therethrough, a vertical way on the outside ofthe end of said arm, said way .and end having two vertical slots therein, a

journal box carrying a drill spindle vertically adjustable on said way, two studs projectlng from said journal box through the respective slots and adjustable therein, a lever within the opening in the arm and having a central fulcrum engaging the end of the arm between the slots and also having its ends bifurcated to embrace the respective studs, and nuts on said studs to engage the respectiveends of the'lever.

5. An adjustable drill supporting arm, comprising an arm having a vertical opening therethrough and having one of its ends extended downward below the body ofv the arm, a vertical way on the outside of the said extended end of the arm, said way and end having two vertical slots therethrough, one of said slots being located in the extended portion of the end, a journal-box adjustable on said way and carrying a drill spindle, two studs projecting from said journal box through the respective slots in the end of the arm, .a lever having a central fulcrum. engaging the inner urface of the arm between the slots, the enls of said lever being b1- furcated to embrace the respective studs, and

In testimony whereof ll afix my signature in presence of'two witnesses.

EDGARW. CLEVELAND. Witnesses;

LUTHER V. Momaon, PALMER A. Jones. 

